10 Year Thermally Enhanced Optical Smoke Alarm (Thermoptek) - FireAngel ST-750T

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The FireAngel ST-750T has a Thermoptek smoke sensor, making it less prone to false alarms from cooking fumes.

The alarm is fitted with a sealed Panasonic lithium battery designed to last for the full ten year life of the alarm.

Product CodesST-750RST-750QST-750T

10 Year Warranty
Certifed to BS Standards
Thermoptek Sensor
Lithium Battery
Product Overview

The ST-750T features FireAngel's groundbreaking Thermoptek technology. When the alarm detects a rise in temperature the optical smoke detection sensor becomes extra sensitive, making it able to detect fires much faster than standard optical alarms, while at the same time reducing the risk of false alarms. Powered by a sealed Panasonic lithium battery, the ultimate in battery life reliability, there is no need to change the alarm's battery for its entire 10 year lifespan.

The alarm also has a very helpful "Sleep Easy" function which allows homeowners to silence the end-of-life chirp after ten years for 8 hours to avoid being disturbed while asleep.

FireAngel's Thermoptek smoke alarms are recommended by the UK's Fire and Rescue Service.

  • Sealed Panasonic lithium battery provides ultimate reliability
  • Large test / silence button for no-hassle maintenance
  • Alarm Smart Silence feature helps provide maximum protection
  • Thermally enhanced sensor for quicker reactions to fire (compared to standard optical smoke alarms)
  • Reduced risk of false alarms and therefore suitable for areas adjacent to a kitchen
  • Sleep Easy™ function temporarily silences end-of-life warning chirps for 8 hours
  • Suitable for installations complying to BS 5839-6:2013 Grade F
  • Smoke alarm technology of choice for the UK's Fire and Rescue Service
  • Supplied with fixings; 2 x screws and 2 x rawl plugs
  • CE marked and Kitemarked to BS EN 14604
  • 10 year manufacturer's warranty
  • Please note: While the alarm features a red ring on the front, only a very small LED flashes red every 40 seconds to indicate that the alarm is working correctly.
Technical Data

Technical Data

This is the technical data for the 10 Year Thermally Enhanced Optical Smoke Alarm (Thermoptek) - FireAngel ST-750T.

Product Code FAST750T
Alternative Product Codes ST-750R, ST-750Q, ST-750T
Weight 0.25kg
Dimensions (HxDia) 34x130mm
Battery Type Sealed Panasonic lithium battery
Battery Life 10 year lifespan of the alarm
Sound Output 85dB at 3 metres
Operating Temperature +4 °C to +38 °C
Relative Humidity (non-condensing) Up to 90%
FAQs (9)

Q. What smoke alarm should I use in a bedroom with an en suite bathroom?

A. It is usually recommended to install an optical smoke alarm in a bedroom. This is because optical smoke alarms are slightly quicker at detecting slow smouldering fires that can originate from upholstery type materials and over-heated wiring. Also, an optical smoke alarm would be less likely to sound a false alarm than an ionisation would, if steam/water droplets were present from the bathroom. Detectors should be installed as central to the room as possible; however for your application I would also consider the position of the en suite to make sure that the detector is not in the direct path of the joining door. This is just to try and avoid the chances of a false alarm. No detector is designed for use in bathroom areas.

Q. How do I safely dispose of my old smoke alarms?

A. Safelincs is signed up to Valpak's WEEE (Waste Electrical and Electronic Equipment) Distributor Take-Back Scheme (Registration ID: 7370). Private households can therefore drop off their electronic and electrical fire safety waste at their municipal recycling centre when they are purchasing new products from us. To find your nearest recycling centre, please visit www.recycle-more.co.uk.

Q. How long do the batteries last in smoke alarms?

A. The 9V alkaline batteries last 12~18 months. Lithium batteries will usually last 5x longer than their alkaline counterparts, achieving around 5 years lifetime. Some lithium cells are also rechargeable, and when used in a mains-powered alarm may last for the entire functional lifespan of the alarm. Newer alarm models may also feature a "sealed" lithium battery. These batteries are specialist components which are designed to not be removed or need replacing by the user, and have been tested by the alarm manufacturer to ensure they last for the lifetime of the alarm.

Please Note: the actual lifetime of your batteries depends on how often the alarms are tested or activated, as sounding the alarm draws more power than when the alarms are "waiting" to detect fire. You should also read your alarm's manual to make sure you only use the recommended types and brands of batteries, as failing to follow these instructions may cause the alarm to malfunction, not alerting you in the event of a fire, and might also invalidate the warranty.

Q. Can a smoke alarm be fitted with a sticky adhesive pad in a let property?

A. The sticky pad is suitable for all battery operated smoke alarms. However, we cannot judge if battery alarms are suitable for your let property, as let properties usually require mains powered alarms. There is some advice to this in the governments guides to fire risk assessments. http://www.safelincs.co.uk/Fire-Risk-Assessment/
Also see the LACoRS guide for let properties.

Q. What sort of smoke alarm system would I need to install for a HMO?

A. BS 5839-6 recommends that one or two storey HMOs with an individual floor area of no more than 200sqm (not the total of both floors) should have a Grade D smoke alarm system installed. Grade D refers to mains powered smoke alarms with a back up battery power supply. The alarms can be interlinked either by wire or by radio signal and the system does not require a separate fire alarm panel. For HMOs of 3 storey or higher, a Grade A panel system would need to be installed. This can cover the whole of the building, or can be used just for the communal areas with a separate Grade D system installed for the individual dwellings. For both applications, the level of cover should be a minimum of LD3 (in all escape routes) but this may change according to the fire risk assessment.

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Key Product Features

Large and easy-to-use test/silence button

Tamper-proof sealed Panasonic lithium battery

Unobtrusive small LED light indicates working status every 40 seconds

Screws and rawl plugs included for quick installation

Product Dimensions

What's Included?

  • 1 x FireAngel ST-750T Thermoptek alarm
  • 1 x Tamper-proof 10 year lithium battery
  • 2 x Screws and rawl plugs
  • 1 x Instruction manual

Product Datasheets

Customer Reviews

43 customers have rated this product and it has an overall rating of 4.7 out of 5

All our reviews are written by real customers that have purchased this product from us and are published without modification.

4 / 5 Stars

Reviewed by: KR

Good service and came on time .

Published on: 19th February 2019

5 / 5 Stars

Reviewed by: PW

Simple to install and great quality product The FireAngel 10 year Thermally Enhanced Optical Smoke Alarm is an excellent product and extremely easy to install and start using.

Published on: 26th September 2018

5 / 5 Stars

Reviewed by: JR

An excellent smoke detector Easy to fit up and is effective

Published on: 22nd July 2018

5 / 5 Stars

Reviewed by: BR

Straightforward instructions simple as abc!!excellent product good with loud alarm

Published on: 17th July 2018

4 / 5 Stars

Reviewed by: EB

good product easy to put up well built

Published on: 10th July 2018

4 / 5 Stars

Reviewed by: NG

Easy to fit

Published on: 16th May 2018

5 / 5 Stars

Reviewed by: JL

Nice compact product, easy to install, very loud alarm Great website, rapid delivery, excellent service

Published on: 14th May 2018

5 / 5 Stars

Reviewed by: LF

Easy to use and looks great

Published on: 12th May 2018

5 / 5 Stars

Reviewed by: JW

Very efficient

Published on: 4th May 2018

5 / 5 Stars

Reviewed by: CR

instruction easy to follow and works well

Published on: 19th April 2018

4 / 5 Stars

Reviewed by: CC

Device seems to be good, installation was easy. Hoping that we never need this device!

Published on: 8th April 2018

5 / 5 Stars

Reviewed by: MR

Easy to install with clear instructions.

Published on: 31st March 2018

5 / 5 Stars

Reviewed by: MT

The product was exactly as described

Published on: 19th March 2018

5 / 5 Stars

Reviewed by: NF

Excellent Product, easy to fit

Published on: 9th March 2018

5 / 5 Stars

Reviewed by: RT

Great service, very good product well packaged and easy to install

Published on: 7th March 2018

5 / 5 Stars

Reviewed by: EB

Extra double thumbs up.. Again, very impressed with device. Decorator asked where I purchased it as he was interested for himself.

Published on: 2nd March 2018

5 / 5 Stars

Reviewed by: JC

very good product.

Published on: 2nd February 2018

5 / 5 Stars

Reviewed by: TB

Easy to fit and test, also seems efficient though stillvery new

Published on: 29th January 2018

5 / 5 Stars

Reviewed by: SK

Can only review ease of fitting

Published on: 21st January 2018

4 / 5 Stars

Reviewed by: JR

Don%u2019t know whether they work and hopefully never will. Easy to install

Published on: 16th January 2018

5 / 5 Stars

Reviewed by: SW

Performed excellently

Published on: 13th January 2018

5 / 5 Stars

Reviewed by: GJ

Just what we wanted. Easy to fix and seems a good product.

Published on: 11th January 2018

5 / 5 Stars

Reviewed by: DB

Easy to install - works as expected - look good

Published on: 8th January 2018

4 / 5 Stars

Reviewed by: PB

seems well made and reliable when testing a further press does not alway turn it off first time

Published on: 31st December 2017

4 / 5 Stars

Reviewed by: IS

Easy to install, hopefully it never needs to work "in anger".

Published on: 16th December 2017

5 / 5 Stars

Reviewed by: SA

Exactly as described. Very quick delivery and easily fitted and working.

Published on: 5th December 2017

5 / 5 Stars

Reviewed by: RA

Loud, would definitely wake you up!

Published on: 19th November 2017

4 / 5 Stars

Reviewed by: NM

Easy to fit. Looks good

Published on: 18th November 2017

4 / 5 Stars

Reviewed by: CC

Hoping that we never need to put it to more of a test than grilling sausages or burning toast but it does seem much less sensitive to such things than our previous alarm

Published on: 12th November 2017

5 / 5 Stars

Reviewed by: KL

Well made easy to operate,loud Alarm

Published on: 9th November 2017

5 / 5 Stars

Reviewed by: JF

Easy to assemble.

Published on: 9th November 2017

5 / 5 Stars

Reviewed by: AW

Easy to fit and seems reliable

Published on: 3rd November 2017

5 / 5 Stars

Reviewed by: KW

Excellent product

Published on: 29th October 2017

4 / 5 Stars

Reviewed by: RS

Appear good but too early to judge Look nice

Published on: 23rd October 2017

5 / 5 Stars

Reviewed by: MH

lovely solid design well worth buying.

Published on: 11th October 2017

4 / 5 Stars

Reviewed by: WP

Neat compact and fits well with easy control

Published on: 19th September 2017

5 / 5 Stars

Reviewed by: GD

Easy to install, reliable so far with no false alarms

Published on: 10th September 2017

5 / 5 Stars

Reviewed by: JH

Easy to fit and test, great buy.

Published on: 3rd September 2017

5 / 5 Stars

Reviewed by: ES

Easy to install and looks smart.

Published on: 28th August 2017

5 / 5 Stars

Reviewed by: MS

An excellent product. Service by Safelincs is second to none.

Published on: 24th August 2017

5 / 5 Stars

Reviewed by: DH

life saver stylish and easy to fit, great that we dont have to change battery. signing up to the reminders is a great idea as time is passing quicker than we were aware of. when i replace the other ordinary one it will be with one of these. will recommend for everyone

Published on: 22nd August 2017

4 / 5 Stars

Reviewed by: CS

Easy to install, no need to worry about batteries I'm hoping this model won't suffer from the early battery failure which the old models did. Has already detected burning toast from the next room!

Published on: 21st August 2017

4 / 5 Stars

Reviewed by: MN

Good qulaity and easy to install.

Published on: 13th August 2017

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Delivery Options

The following delivery options are available on this product.

Free Economy Delivery

Delivered in 3-5 working days by Hermes free of charge

48 Hour Delivery

Delivered in 2-3 working days by Hermes £4.90 ex VAT

Next Working Day Delivery

Delivered the next working day by DHL £6.50 ex VAT

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FireAngel ST-750 Launch Video

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